Supplier Page from Thermo Fisher Scientific for Erbium rod, 12.7mm (0.5in) dia, 99.9% (metals basis excluding Ta)
Ethyl butyrate, 99% from Thermo Fisher Scientific
Ethyl cyanoacetate, 98+% from Thermo Fisher Scientific
Ethylmercurithiosalicylic acid, sodium salt, 97.0-101.0% from Thermo Fisher Scientific